Justin Jackson buried shot after shot from behind the arc in the best performance of his career for No. 7 North Carolina. Coach Roy Williams didn't have much to feel good about otherwise. Jackson matched his career high with 27 points and hit a career-best seven 3-pointers to help the Tar Heels beat Davidson 83-74 on Wednesday night, though they struggled both to slow down high-scoring Wildcats guard Jack Gibbs and find much of a rhythm with top point guard Joel Berry II sidelined by a sprained left ankle.